1. Midterm Results with a Bipolar Radial Head Prosthesis: Radiographic Evidence of Loosening at the Bone-Cement Interface by Nebojsa Popovic, Roger Lemaire, Pierre Georis, and Philippe Gillet J Bone Joint Surg Am Volume 89(11):2469-2476 November 1, 2007 ©2007 by The Journal of Bone and Joint Surgery, Inc.

2. The prosthesis consists of two parts: a radial head made of high-density polyethylene enclosed in a cobalt-chromium cup and a cemented intramedullary stem with a spherical proximal end articulating with the polyethylene liner. Nebojsa Popovic et al. J Bone Joint Surg Am 2007;89:2469- 2476 ©2007 by The Journal of Bone and Joint Surgery, Inc.

3. The seven delineated sections around the radial component for zonal evaluation of radiographic changes. Nebojsa Popovic et al. J Bone Joint Surg Am 2007;89:2469- 2476 ©2007 by The Journal of Bone and Joint Surgery, Inc.

4. Assessment of distal migration of the radial head prosthesis with use of an analysis program built with the Imagika software. Nebojsa Popovic et al. J Bone Joint Surg Am 2007;89:2469- 2476 ©2007 by The Journal of Bone and Joint Surgery, Inc.

5. Proximal bone resorption is present while the distal end of the prosthesis remained rigidly fixed in the cement. Nebojsa Popovic et al. J Bone Joint Surg Am 2007;89:2469- 2476 ©2007 by The Journal of Bone and Joint Surgery, Inc.

6. Seven years after surgery, the patient had a good functional result and mild residual discomfort with activities of daily living despite osteolysis and obvious prosthetic loosening. Nebojsa Popovic et al. J Bone Joint Surg Am 2007;89:2469- 2476 ©2007 by The Journal of Bone and Joint Surgery, Inc.